When players are suspended for a variety of violations, there is always the chance they can get the suspension reduced. For instance, if a player hits a player high and is given a 2-game suspension, if he is a first-time offender he could see that suspension reduced to a 1-game ban.
However, it is almost impossible to win a Performance Enhancing Drug (PED) suspension. Why? Because the substances which are banned are actually found in your body. This isn’t a, “Someone put that syringe in my gym bag!” type of offense. No, this is a, “This substance was in your body.